Ariel has spent a lot of research and dollars in developing the 20T lower bass capabilities, and not utilizing the 20T lower bass capabilities, is not fully maximizing the 20T abilities, therefore, one could consider it a waste of money if you are not going to drive them as they were designed. I do not disagree that the 20T does an excellent job from 100hs and up, it was just designed to be full range.
Which line source are you considering?
Which line source are you considering?